Linux security courses can help you learn system hardening, user access controls, network security protocols, and incident response strategies. You can build skills in configuring firewalls, implementing encryption techniques, and conducting security audits. Many courses introduce tools like iptables for firewall management, OpenSSL for encryption, and Wireshark for network analysis, showing how these skills are applied in practical work to protect systems from vulnerabilities and threats.

Packt
Skills you'll gain: Command-Line Interface, Linux, Ubuntu, Linux Administration, Linux Commands, Unix Commands, Operating System Administration, Unix, Software Installation, Red Hat Enterprise Linux, System Configuration, Network Troubleshooting, User Accounts, Networking Hardware, Network Support, File Systems, Open Source Technology, File Management, Package and Software Management, Computing Platforms
Beginner · Course · 1 - 3 Months

LearnQuest
Skills you'll gain: Version Control, Git (Version Control System), Linux, Cloud Computing Architecture, DevOps, Virtualization, Cloud Computing, Cloud Infrastructure, Containerization, Infrastructure As A Service (IaaS), Software As A Service, Virtual Networking, Virtual Machines, Platform As A Service (PaaS)
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Linux Commands, Network Administration, Network Analysis
Intermediate · Course · 1 - 4 Weeks

Skills you'll gain: Linux Administration, Package and Software Management, Linux, User Accounts, Operating System Administration, System Monitoring, Linux Commands, Amazon Web Services, Unix Commands, Network Troubleshooting, File Management, Command-Line Interface, Amazon Elastic Compute Cloud, Systems Administration, Operating Systems, Shell Script, General Networking, Service Management
Beginner · Course · 1 - 3 Months

Skills you'll gain: Hardening, Linux Administration, System Monitoring, Linux Commands, Performance Tuning, Linux, Systems Administration, File Management, Network Troubleshooting, Unix Commands, Debugging, Service Management, User Accounts, OS Process Management
Advanced · Course · 1 - 4 Weeks

Skills you'll gain: System Monitoring, Shell Script, Bash (Scripting Language), Unix Shell, User Accounts, Linux Commands, Network Monitoring, Linux, Systems Administration, Linux Administration, Operating System Administration, Unix, Ubuntu, Unix Commands, Network Troubleshooting, System Configuration, File Management, File Systems, Command-Line Interface, Red Hat Enterprise Linux
Intermediate · Course · 1 - 4 Weeks

Coursera
Skills you'll gain: Linux Commands, Linux, Unix Commands, Command-Line Interface, File Management, System Configuration, Linux Administration, Package and Software Management, DevOps
Beginner · Guided Project · Less Than 2 Hours

EDUCBA
Skills you'll gain: File Systems, Linux Administration, Linux Servers, Linux, Linux Commands, Software Installation, Data Storage, Data Management, System Configuration, Data Integrity, Data Migration, Command-Line Interface, System Monitoring, System Requirements
Intermediate · Course · 1 - 4 Weeks

Packt
Skills you'll gain: Package and Software Management, Command-Line Interface, Ubuntu, Linux, Linux Administration, Linux Commands, Red Hat Enterprise Linux, Unix Commands, File Systems, Software Installation, Operating System Administration, File Management, Virtual Environment, Open Source Technology
Beginner · Course · 1 - 4 Weeks

LearnQuest
Skills you'll gain: Virtual Private Networks (VPN), Linux Administration, Public Key Infrastructure, Linux, Linux Servers, Intrusion Detection and Prevention, Firewall, Remote Access Systems, Operating System Administration, Authentications, Authorization (Computing), Network Security, Security Controls, Infrastructure Security, Identity and Access Management, System Monitoring, File Management, Systems Administration, Cybersecurity, Information Technology
Beginner · Course · 1 - 4 Weeks

Skills you'll gain: Linux, Ubuntu, Shell Script, Linux Commands, Unix Shell, Unix Commands, Command-Line Interface, OS Process Management, File Management, Virtualization, Virtual Machines, Software Installation
Beginner · Course · 1 - 3 Months

Skills you'll gain: Ubuntu, Linux, Linux Administration, Linux Commands, Unix Shell, File Management, Unix Commands, Command-Line Interface, Software Installation, System Configuration, User Accounts
Intermediate · Course · 1 - 4 Weeks